AT89C51CC03C-RDTIM Atmel, AT89C51CC03C-RDTIM Datasheet - Page 97
![IC 8051 MCU FLASH 64K 64VQFP](/photos/6/81/68127/313-64-vqfp_sml.jpg)
AT89C51CC03C-RDTIM
Manufacturer Part Number
AT89C51CC03C-RDTIM
Description
IC 8051 MCU FLASH 64K 64VQFP
Manufacturer
Atmel
Series
AT89C CANr
Datasheets
1.AT89C51CC03C-S3RIM.pdf
(198 pages)
2.AT89C51CC03C-S3RIM.pdf
(32 pages)
3.AT89C51CC03C-S3RIM.pdf
(27 pages)
4.AT89C51CC03C-S3RIM.pdf
(184 pages)
Specifications of AT89C51CC03C-RDTIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
36
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
AT89C51CC03CRDTIM
- AT89C51CC03C-S3RIM PDF datasheet
- AT89C51CC03C-S3RIM PDF datasheet #2
- AT89C51CC03C-S3RIM PDF datasheet #3
- AT89C51CC03C-S3RIM PDF datasheet #4
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- Download datasheet (3Mb)
Figure 52. General Structure of a Bit Period
4182O–CAN–09/08
(1) Phase error ≤ 0
(2) Phase error ≥ 0
(3) Phase error > 0
(4) Phase error < 0
system clock
oscillator
data
Tsyns (*)
example of bit timing determination for CAN baudrate of 500kbit/s:
Fosc = 12 MHz in X1 mode => FCAN = 6 MHz
Verify that the CAN baud rate you want is an integer division of FCAN clock.
FCAN/CAN baudrate = 6 MHz/500 kHz = 12
The time quanta TQ must be comprised between 8 and 25: TQ = 12 and BRP = 0
Define the various timing parameters: Tbit = Tsyns + Tprs + Tphs1 + Tphs2 = 12TQ
Tsyns = 1TQ and Tsjw =1TQ => SJW = 0
If we chose a sample point at 66.6% => Tphs2 = 4TQ => PHS2 = 3
Tbit = 12 = 4 + 1 + Tphs1 + Tprs, let us choose Tprs = 3 Tphs1 = 4
PHS1 = 3 and PRS = 2
BRP = 0 so CANBT1 = 00h
SJW = 0 and PRS = 2 so CANBT2 = 04h
PHS2 = 3 and PHS1 = 3 so CANBT3 = 36h
(*) Synchronization Segment: SYNS
1/ Fcan
Tsyns = 1xTscl (fixed)
Tscl
Tbit calculation:
Tprs
one nominal bit
Bit Rate Prescaler
Tbit
Tbit
Tphs1 + Tsjw (3)
=
Tphs1 (1)
Tsyns
Sample Point
+
Tprs
Tphs2 - Tsjw (4)
+
Tphs1
Tphs2 (2)
AT89C51CC03
Transmission Point
+
Tphs2
97
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